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On the classification of spatially homogeneous 4D string backgrounds
A classification of all possible spatially homogeneous 4D string backgrounds (HSBs) has been obtained by appropriate ramification of the existing nine Bianchi types of homogeneous 3D spaces. A total of 24^2=576 HSBs which have been classified as distinct contains a subclass of 192 which includes all...
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Lenguaje: | eng |
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1995
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Acceso en línea: | http://cds.cern.ch/record/277447 |